Consider the following statements.

1. Biodiversity hotspots are located only in tropical regions.

2. India has four biodiversity hotspots, i.e. Eastern Himalayas, Western Himalayas, Western Ghats and Andaman and Nicobar Islands. 

Which of the statements given above is correct?

Consider the following about Ramsar Convention:

$1$. $2$nd February each year is World Wetlands Day.

$2$. The Ramsar Convention is the only global environmental treaty that deals with a particular ecosystem.

$3$. The 11th Meeting of the Conference of the Parties to the Convention (Ramsar COP$11$) was held in Bucharest, Romania.

Which of the statements given above is/are true?

Consider the following statements
1. The boundaries of a National Park are defined by legislation. 
2. A Biosphere Reserve is declared to conserve a few specific species of flora and fauna. 
3. In a Wildlife Sanctuary, limited biotic interference is permitted. 
Which of the statements given above is/are correct?

Consider the following 

$1$. Star tortoise

$2$. Monitor lizard

$3$. Pygmy hog

 $4$. Spider monkey

Which of the above are naturally found in India?

Due to their extensive rice cultivation, some regions may be contributing to global warming. To what possible reason/reasons is this attributable?

$1$. The anaerobic conditions associated with rice cultivation cause the emission of methane.

$2$. When nitrogen-based fertilisers are used, nitrous oxide is emitted from the cultivated soil.

Which of the statements given above is/are correct?